KR100723254B1 - Apparatus for returning tong-key of tongs crane - Google Patents

Abstract

If the tong key block of the tong key due to excessively close tong tank in the crane having tons for transporting the slabs occurs, the tong crane is returned to the working position by tightening the tong key to the ventilation block for slab transportation. A tong key automatic return device for a tongs crane is provided.

The apparatus 1 as described above is fixed on a lifting bar 62a which is installed to be moved up and down between the rolls R 'of the slab feed roller table R, and the guide roll 32 of the barrel portion 30. A first adjusting portion 60 having a lifting frame 62 in contact with it; And a stopper 72a fixed to a lower portion of the movable block 72 installed to move up and down in the center of the tongs frame 20 through the frame 20 on both sides of the movable block 72. And a second adjustment unit 70 having a support 76 supported to move up and down along the guide bar 74 connected to the through bar 42 of the 40.

Therefore, according to the present invention, when the tong key block deviation of the tongki occurs because the tongs of the tongs crane are in close contact with the tongs, it is quickly returned to the working state of the crane, thereby enabling smooth process injection of the slab through the tongs of the crane and thus productivity. Provides excellent effects to improve.

Playing process, slabs, cranes, tongs cranes, tongki, tongsjo return device

Description

Tongs crane automatic return device {APPARATUS FOR RETURNING TONG-KEY OF TONGS CRANE}             

1 is a view showing a crane having a tong for a general slab transportation, (a) is a schematic perspective view showing the overall configuration

(b) is a perspective view showing only the tongs portion

Figure 2 is a perspective view showing a position defective state of the tub in the conventional tub crane

Figure 3 is a perspective view showing a tongki automatic return device of the tongs crane according to the present invention

Figure 4 is a perspective view showing the operating state of the tongki automatic return device of the inventor's tongs crane

5 is a perspective view showing a first adjustment unit in the tongki automatic return device of the present inventors tongs crane;

FIG. 6 is a view illustrating a second adjustment unit in the tongki automatic return device of the present inventors tongs crane,

(a) is a perspective view showing the whole configuration

(b) an exploded perspective view

7 is a perspective view showing the operating state of the second adjustment unit in the tongki automatic return device of the present invention Tongs crane

Explanation of symbols on the main parts of the drawings

10 .... crane 12 .... crane body

20 .... Tons Frame 30 .... Tonsbu

34 .... Tongsjo 40 .... Tongkibu

42 .... Tonky Frame 44 .... Tonky

46 .... Tonky Block 50 .... Tonks Reverter

60 .... 1st adjustment part 62 .... lifting frame

64 .. Fixed plate 66 .... Air cylinder

68 .... Operating link 69,80a .... Guide roll

70 .... 2nd control part 72 .... moving block

72a .... stopper 74 .... guide bar

76 ... Support 80 Vertical

S, S '... sensor

The present invention relates to a tongs crane having a tongs (TONGS) for transporting a heavy material, in particular, a slab manufactured in an iron making plant. By being in close contact, the tong key return device of the tongs crane for quickly returning the tong key block fastening of the tong key to prevent the operation of the crane caused when the tong key is released from the tong key block.

In general, slabs produced continuously in the refining plant of the steel mill are cut to length to meet the demand of the customer with the standard thickness of 230mm, width 850 ~ 2000mm, and length of 5500 ~ 12000mm. S) is to be put into the post-process, that is, rolling and coiling process, in order to move such a heavy slab is used a crane having a tongs (TONGS) for the movement of the slab, in Figures 1 and 2 A tongs crane having a tongs for movement of the same slab is shown.

That is, as shown in Figure 1, the crane 10, that is, the unmanned automatic crane 10 installed in the slab storage place of the steel mill is rolling and coiling the slab (S) cast in the continuous casting machine of the steel mill described above When the slab (S) loaded in the loading bed and loaded on the roller table (R) and the hot-loading slab bed for operating the post-processing line of the slab (S) is a facility for moving the slab to the online roller table (R), after The slab S on the roller table is transferred to a heating furnace for hot rolling.

That is, as shown in FIG. 2, the tongs section 30 is attached to the tongs frame 20 which is connected to the crane main body 12 to move rails up and down as the operation wire W. 30 has a pair of tongs jaws linking to the bottom of the tongs frame 20, and a tong key frame 42 provided at the center of the bottom of the tongs frame 20 on the central axis of rotation of the tongs sock 34 A tong key 44 supported by the tong key block 46 is provided.

Therefore, as shown in FIGS. 1B and 2, the guide rolls 32 installed on the lower side of the tongs 34 are lowered while the tongs 34 of the tongs 30 are slightly open. According to the state in contact with the trough tub (34) is opened in a state capable of fixing the slab (S) is in close contact between the lower fixing end (34b) of the trough tub (34) to raise and transport the slab (S) The work is done.

However, as shown in FIG. 2, in the conveying operation of the slab S through the conventional crane tongs 34 as described above, the slab S cast in the player is conveyed through various facilities so that the roller table ( When the position of the slab S finally seated on R) is a little bad, or when the position of the slab S waiting to be placed on the charging bed for charging the hot rolling process in the state of loading is poor, As the 34 are eccentrically seated on one side of the slab S, the actual slab S is not hoisted and only the crane tongs 34 are in close contact with each other.

Therefore, in this case, if the tongs (34) are in close contact with each other, the tongki (44) is separated from the tongki block 46 on the tongki frame 42, and eventually the tongki (for the normal slab hoisting operation of the crane) Since the fastening of the tong key block 45 of the 44 must be preceded first, in the related art, an apparatus for fastening such a tong key 44 to the tong key block 46, that is, the tongs 34 of the crane 10 are excessively in close contact. There was no device for spreading it back to the working position.

Therefore, since the normal slab transportation of the crane is stopped, it is inevitable that the worker can use the separate jig, such as the wire and the pedestal manually, to allow the normal operation of the key key 44 to the key key block 46. By returning the tongs (34) of the tongs section 30 in close contact with an appropriately opened state to perform the fastening operation of the tongkey block 46 of the tongs (44).

As a result, when the worker performs the fastening operation of the tong key using the jig, that is, the returning operation of the tong key, the damage of the equipment in which the tong tub 34 itself is broken frequently occurs while the worker is working with excessive force. In addition, there is a high risk of safety accidents caused by workers colliding with the surrounding equipment in the field, and in particular, the smooth hot rolling process of the slab is delayed, thereby reducing the overall productivity.

Therefore, it would be desirable to perform the quick return operation of the tong key due to the poor position of the tongs of the tongs crane automatically and without the operator's manual work because it prevents safety accidents and equipment damage.

The present invention has been made in order to solve the various problems as described above, the object is that, when the tong tank of the crane for the transportation of the slab excessively close position of the tong tank occurs, when the tongki block departure occurs, It is an object of the present invention to provide a tong key automatic return device of a tongs crane which allows the slewing of the slab by the tongs crane to be smoothly returned to the original fastening position quickly.

In addition, another object of the present invention, primarily through the first adjustment portion on the roller tail side to which the slab is conveyed to eliminate the excessive closeness of the tub to adjust the tong key fastening, when there is a slab on the roller table when the slab frame It is to provide a tong crane automatic return device for the tongs crane to perform a more smooth tong key return operation by additionally eliminating the excessive close contact of the tub through the second adjustment unit installed in the tong key.

The present invention as a technical configuration for achieving the above object, the slab carrying tongs having a tongs part having a tubs for connecting the link operation to the lower side of the tongs frame for transporting the slab, and a tong key portion provided between the tongs parts. A crane comprising: a first adjusting portion having a lifting frame fixed on a lifting bar installed between the rolls of a slab conveying roller table so as to move upward and downward, and having a guide roll of the tubular portion in contact; And,

A stopper fixed to a lower portion of a moving block installed to move up and down in the center of the tongs frame, and having a support supported on both sides of the moving block to move up and down along a guide bar connected to the tongs bar of the tong key through the frame; By adjusting the tong key automatic return device of the tongs crane consisting of.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 3 is a perspective view showing the tong key automatic return device of the tong crane according to the present invention, Figure 4 is a perspective view showing the operating state of the tong key return device, Figure 5 is a perspective view showing a first adjustment unit in the tong key return device 6 is a view showing a second adjustment unit in the tong key return device, and FIG. 7 is a perspective view showing an operating state of the second operation unit in the tong key book return device, and the same configuration as that of the conventional tong crane is indicated by the same reference numeral.

First, FIG. 3 shows the overall configuration of the tongey automatic return device 50 of the tongs crane according to the present invention. The apparatus 50 of the present invention is largely referred to as the first adjustment unit 60 and the second adjustment unit 70. The components 60 and 70 are described in detail as follows.

First, referring to the tongs crane 10 having a tongs part 30 for carrying the slab S according to the present invention, as shown in FIGS. 1 and 2, the crane 10, that is, the rail moving An operating wire W installed to be operated as a motor and a driving pulley in the crane body 12 is fastened between the pulleys P of the tongs frame 20 to be described below to allow movement of the tongs frame 20. It is.

In addition, a tongs 30 and a tongki 40 are respectively provided below the tongs frame 20. As shown in FIG. 2, the tongs 30 is located at the bottom of the frame 20. A pair of tubs 34 are connected to the connecting link 36a pivoted on the connecting plate 36 in the front and rear in a link manner.

In addition, as shown in Figure 6b, the tongki frame 42 is connected to the bottom of the frame 20 as a link link 48, the tong jaw 34 on both sides of such a tongki frame 42 A pin portion 42a is formed to fix the central axis of rotation. The tong key frame 42 is provided with a tong block 46 mounted on the bottom of the frame 20 to which the tong 44 is seated and supported.

Next, FIGS. 3 to 5 show the first adjusting part 60 of the tongki automatic return device 50 of the present invention tongs crane, which is the first adjusting part 60 of the present invention. It is fixed on the lifting bar (62a) installed to move up and down between the roll (R ') of the slab feed roller table (R) for feeding into the hot rolling process, the guide roll 32 of the barrel portion 30 is in contact A lifting frame 62 is provided.

That is, an operation link having one end connected to an air cylinder 66 mounted downwardly on a fixing plate 64 disposed between the roller tables R perpendicular to both sides of the lifting bar 62a of the first adjustment unit 60. 68 is connected, the operation link 68 is pivotally fixed to the bottom of the fixing plate 64, the central portion (68a), the other end is connected to the bottom of the lifting bar (62a) It is.

Of course, although not shown in the drawings, the respective connecting portions are connected in a hinged manner so as to be rotatable, and eventually the lifting bar 62a is integrally fixed with the operation of the cylinder 66. Up and down between the 64, and at the same time the lifting frame 62 fixed on the fixing plate 64 is also moved up and down integrally.

And, the side of the fixing plate 64, that is, the side toward the lifting bar 62, the guide rolls 69 are mounted up and down, so that the lifting bar 62a is the fixing plate 64 It is comprised so that it may move stably while being supported by the guide roll 69.

In addition, as shown in Figure 4, the fixed plate 64 of one side of the fixed plate on both sides is mounted on the edge surface of the lifting bar 62, the sensor operation to move up and down integrally with the lifting bar 62 Sensors S1 and S2 operated by the piece 63 are mounted, respectively.

Next, in FIG. 3, FIG. 6, and FIG. 7, the 2nd adjustment part installed in the said 2nd adjustment part 70, ie, the tongs part 30 in the tong key automatic return device 50 of this invention's tongs crane, adjusts the return of a tongs tank. 70, the second adjustment unit 70 is a stopper 72a fixed to a lower portion of the moving block 72 installed to move up and down in the center of the tongs frame 20. Both sides of the 72 are provided with the support 76 supported to move up and down along the guide bar 74 connected to the through bar 42 of the tongki part 40 via the frame 20.

6 and 7, the moving block 72 of the second adjustment unit 70 as described above includes a motor 78a and a gear box 78b provided at the center of the trough frame 20. The screw bar 78c disposed to be driven through the () is inserted into the screw groove 78d formed therein, and on the front and rear sides of the movable block 72, the vertical bar 80 vertically installed on the frame 20 is disposed. The guide roll 80a is supported and configured to move up and down when the motor is driven.

In addition, the support 76 is integrally formed with an opening 76a through which the moving block 72 passes through the center, and wing portions 76b formed at both sides of the support 76 are guide bars 74. The pin (76c) is fixed to the upper portion of the moving block 72 to rise by the lower stopper (72a) to rise.

On the other hand, the guide bar 74 is configured to move up and down integrally by the support 76 by the guide rolls 75 installed on the top of the barrel frame 20, the one side of the guide bar 74 By the sensor bar 82 installed in the support 76, a plurality of sensors S1 ', S2', S3 'and S4' which operate in accordance with the position are arranged.

Referring to the operation and effects of the present invention made in the above configuration in more detail as follows.

First, as shown in FIG. 2, while the tubs 34 of the tubs 30 of the tongs crane 1 are excessively in close contact with each other, the spacing is narrowed to transport the slabs S by the tubs 34. In this difficult case, that is, when the tong 44 of the tongki 40 is disengaged from the tongki block 46, as shown in Figs. 6 and 7, the motor 78a is driven to drive the gearbox 78b. The rotating spindle 78c is driven.                     

At this time, by moving the moving block 72 formed with the strand groove 78d fastened to the spindle 78c to move the guide bar 74 as the lower stopper 72a, thereby moving the tong key frame 42 The reference point is set so that the spacing of the pairs 34 is narrower than the minimum width of the slab S.

Next, as shown in Figures 4 and 5, when the slab (S) enters the roller table (R) or the slab (S) is charged to the charging bed (not shown) by the crane, although not shown in the drawings The operation panel PLC of 50 and the operation panel PLC of the crane 10 are operated to move the barrel section 30 to an initially designated position, and the crane hoist (not shown) descends to lift the crane barrel section 30. When the guide roll 32 installed in the) is seated on the slab (S) and the weight of the tongs (34) is no load by the load cell, the hoist is stopped and then the crane tongs (34) to the home position of the hoist. The slab (S) is wound up.

At this time, as shown in Figure 6, if the slab (S) is confirmed whether the hoisting normally, the sensor bar 82 of the support 72 moving along the guide bar 74 is moved to detect the sensor If (S4 ') is not in contact, the slab is judged to have no abnormality and the slab is transported to the designated position to carry out the work.

However, as shown in Figs. 2 and 3, when the slab S is not normally hoisted and only the crane tongs 34 are hoisted, the tong key 44 is released from the tong key block 46 and the tong key frame. The space between the 42 and the trough frame 20 becomes wider.                     

As a result, the guide bar 74 bolted to the tongki frame 42 as the lower end of the bracket b is lowered, and the support 76 is lowered integrally to closely contact the stopper 72a of the movable block 72. As it stops, the sensor bars 82 on both sides of the sensor bar 82 are in contact with the sensor S4 'at the lowermost level to operate the sensor bar 82 to determine whether there is an abnormality through the PLC to which the sensor is connected.

Next, in order to check whether or not the first adjusting unit 60 installed on the roller table R is used for the return of the tub casting 34, it is checked whether or not the slab S is present in the roller table R and the slab S is used. 4 and 5, the crane 10 moves to the initial position of the roller table R, and operates the air cylinder 66 of the first adjusting unit 60 to fix the plate 64. When the sensor S1 provided on the) is operated as the sensor bar S2 provided on the lifting bar 62a, the crane 1 is lowered by the hoist hoist 34 so that the crane tongs 34 are lowered to guide the tongs 30. When the roll 32 is seated on the lifting frame 62 and the weight of the tongs 34 is no load by the load cell, the operation of the sensor S4 'is performed so that the tong 44 is attached to the tongkey block 46. While the hoist stops, the crane tongs 34 are hoisted up to the home position while being engaged.

Accordingly, when the tongs 34 are hoisted, the lifting frame 72 of the first adjustment unit 60 is operated by the air cylinder 66, which is advanced in advance, to move backward, that is, to raise the operation link 68. The upper sensor (S1) is operated as the sensor operating piece 63 to transmit the presence or absence of the position of the slab (S) in the slab loading bed, and finally the operator checks the abnormality and then switches the operation mode to the designated position When the slab is transported and the lower sensor S2 is operated as the sensor operating piece 63, the lifting frame 62 makes it sense that it is positioned under the roll R 'of the roller table R. .

By the way, in order to check whether the first adjustment part 60 provided in the roller table R is used in order to return the tongs 34, if there is a slab S, the lifting frame 72 of the 1st adjustment part 60 may be carried out. Cannot be used, the second adjusting unit 70 of the apparatus 50 of the present invention shown in FIG. 6 is operated.

That is, only the second adjusting unit 70 installed on the crane 1 side is operated alone to perform the tong key frame fastening operation of the tong key. The motor 78a is driven to drive the spindle 78c through the gearbox 78b. When it rotates, the moving block 72 in which the strand groove 78d in which the spindle 78c is fastened is made to move up or down.

However, when the movable block 72 is raised, the support stop 76 in close contact with the lower stopper 72a is raised. When the support 76 is raised, the guide bar 74 connected with the pin is raised to eventually raise the support 76. The lower end of the guide bar 74 is bolted to the tongki frame 42 connected to the bracket (b) integrally, the tongs (34) connected to the hinge (42a) of the tongki frame 42 by the linkage integrally As it rises, the interval between the tubs 34 is widened and the tong 44 is fastened to the tong key block 46.

Then, when the upper sensor S1 'is operated by contact with the sensor bar 82 formed to protrude to both sides of the supporter 76, the motor 78a stops with this signal, and then the motor 78a is stopped again. When the moving block 72 descends by driving backward, the support 76 and the guide bar 74 are lowered together, and when the lower sensor S4 'is operated as the sensor bar 82, the driving motor 78a is stopped again. And the position abnormality of the slab (S) deposited on the bed is grasped,

Next, the operator switches to the operation mode after checking whether there is an abnormality, and then moves the slab to the designated position to repeat the transport of the slab.

At this time, as shown in Figure 6a, if the plurality of sensors (S2 ') (S3') (S4 ') are sequentially installed in the lower side of the path that the sensor bar 82 is moved, eventually the moving block 72 As a result, the lower stopper 72a can be raised and lowered to adjust the movement interval of the support 76 which is integrally moved.

Accordingly, compared to the conventional operator by manually widening the interval between the tubs 34 by hand, and adjusting the tong key is released from the tong key block due to excessive contact of the tubs 34, the tongs tub return device 50 of the present invention. According to), when the tongs (34) are in close contact with each other, it is quickly returned to the initial working position without the manual operation of the operator to perform the return operation of the tong key for the slab hoisting operation, smooth hoisting and line input To improve line productivity.

As described above, according to the tong key automatic return device of the tongs crane of the present invention, when a tong key position defect occurs in which the tongs of the crane for transporting the slab is in close contact with the tongs crane, the tongs of the crane are automatically changed to the initial working position. It is effective to more smoothly perform the hot rolling process of the slab through.

Furthermore, when there is no slab on the roller table side first, the tox tub is returned as the first adjusting unit, and when the slab is on the roller table, the tongs position is adjusted as the second adjusting unit provided on the tong frame. It is to provide an excellent effect that can be carried out according to the standby state of the slab more smoothly to return the tong key block of the tong key block.

While the invention has been shown and described with respect to specific embodiments thereof, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit or scope of the invention as set forth in the claims below. I would like to know that those who have knowledge of this can easily know.

Claims (5)

For slab transport having a tub section 30 having tub tubs 34 connected to the lower side of the tub frame 20 so as to operate the slab, and having a tub key 40 disposed between the tub sections 30. In the tongs crane 10, The lifting frame 62 is fixed on the lifting bar 62a which is installed to move up and down between the rolls R 'of the slab feed roller table R, and the guide rolls 32 of the tub 30 contact each other. Equipped first adjusting unit 60; And, A stopper 72a fixed to a lower portion of the movable block 72 installed to move up and down in the center of the tongs frame 20, and a tong key portion 40 through the frame 20 on both sides of the movable block 72. A second adjustment unit 70 having a support 76 supported to move up and down along the guide bar 74 connected to the barrel bar 42 of the tank bar; 2. The lifting bar 62 of the first adjusting part 60 has one end to an air cylinder 66 mounted downwardly on a fixing plate 64 disposed between the roller tables R perpendicular to both sides thereof. Is connected, and the other end of the operation link 68 pivoted at the bottom of the fixed plate 64 is connected to the bottom to move up and down between the fixed plates 64 according to the operation of the cylinder 66. Tonky automatic return device of tongs crane, characterized in that The side of the fixing plate 64, the guide rolls 69 for supporting the lifting bar 62 is mounted, the one side of the fixed plate 64, the edge surface of the lifting bar 62 Tonks automatic return device of the Tongs crane, characterized in that the sensor (S1) (S2) detected in accordance with the movement of the sensor operation piece 63 mounted on the The screw bar of claim 1, wherein the moving block 72 of the second adjusting unit 70 is disposed to be driven through a motor 78a and a gearbox 78b provided at the center of the tongs frame 20. 78c is inserted into a screw groove 78d formed therein, and the front and rear side surfaces of the movable block 72 are supported with a guide roll 80a on a vertical stand 80 vertically installed on the frame 20 so as to support the motor. Tonky automatic return device for tongs crane, characterized in that configured to move up and down during operation The wing 76 according to claim 1 or 4, wherein the support 76 is integrally formed with an opening 76a through which the movable block 72 passes through the center, and wings 76b formed on both sides of the support 76. The pin (76c) is fixed to the upper portion of the guide bar (74) is configured to rise by the lower stopper (72a) when the moving block 72, On one side of the guide bar 74, a plurality of sensors S1 ', S2', S3 'and S4' operated according to the position by the sensor bars 82 protruding to both sides of the support 76. Ton key automatic return device of the Tongs crane, characterized in that is arranged

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